216142351 has 2 divisors, whose sum is σ = 216142352. Its totient is φ = 216142350.

The previous prime is 216142319. The next prime is 216142361. The reversal of 216142351 is 153241612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216142351 - 2⁵ = 216142319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216142361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108071175 + 108071176.

It is an arithmetic number, because the mean of its divisors is an integer number (108071176).

Almost surely, 2^216142351 is an apocalyptic number.

216142351 is a deficient number, since it is larger than the sum of its proper divisors (1).

216142351 is an equidigital number, since it uses as much as digits as its factorization.

216142351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 216142351 is about 14701.7805384246. The cubic root of 216142351 is about 600.1317775372.

Adding to 216142351 its reverse (153241612), we get a palindrome (369383963).

The spelling of 216142351 in words is "two hundred sixteen million, one hundred forty-two thousand, three hundred fifty-one".